Harry Styles is tangled in a love triangle in the release of the new trailer for "My Policeman," an upcoming romantic drama set in the '50s.

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Directed by Michael Grandage, "My Policeman" is based on Bethan Roberts’ novel of the same name. Set primarily in the British sea town of Brighton, Styles stars as Tom, a young policeman who marries a school teacher named Marion (Emma Corrin), while maintaining a secret relationship with Patrick (David Dawson), a museum curator. The romantic drama explores themes of forbidden love and shifting social conventions. The trailer begins as Tom and Patrick admire a painting,

"So, how does it make you feel?" Patrick begins.

"You can sense the waves and how strong they are, like swimming in strong surf. You feel they could crush you or take you under," Tom replies.

Later in the film picks up with Tom, Marion, and Patrick 40 years later as they grapple with the long-lasting effects of those intense early years and try to repair the lingering damage.

"You feel they could crush you or take you under." Harry's Tom says.

"My Policeman" is one of two films Styles is set to star in this year, along with "Don’t Worry Darling," a psychological thriller directed by his girlfriend Olivia Wilde, out Sept. 23.

"My Policeman" will debut in theaters Oct. 21, before hitting Prime Video Nov. 4.